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2019-07

Precision Bright Steel Pipe Manufacturing Process

It is a high-precision steel pipe material processed by cold drawing or hot rolling. Due to the fact that the inner and outer walls of precision steel pipes have no oxide layer, withstand high pressure without leakage, have high accuracy, high finish, do not deform during cold bending, expand, flatten, and have no cracks, etc.,

It is a high-precision steel pipe material processed by cold drawing or hot rolling. Due to the fact that the inner and outer walls of precision steel pipes have no oxide layer, withstand high pressure without leakage, have high accuracy, high finish, do not deform during cold bending, expand, flatten, and have no cracks, etc., they are mainly used to produce products of pneumatic or hydraulic components, such as air cylinders or oil cylinders, which can be seamless pipes or welded joints. The chemical components of precision steel pipes include carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr.

Pronunciation of precision steel pipes in various countries

China: j ǐ ng mì g ā ng gu ǎ N Spain: tubo preciso de acero French: le tube d acier de pr é decision

Difference between precision steel pipe and seamless steel pipe

1. The main feature of seamless steel pipes is that they have no welded joints and can withstand large pressures. The product can be a very rough cast or cold drawn part. 2. Precision steel pipe is a product that has emerged in recent years, mainly due to strict tolerances and roughness on the dimensions of the inner hole and outer wall.

Characteristics of cold drawn precision steel pipes

1. Smaller outer diameter. 2. High precision for small batch production 3. High precision for cold drawn finished products and good surface quality. The cross-sectional area of the steel pipe is more complex. 5. The steel pipe has superior performance and relatively dense metal.

Differences after hot-rolling precision steel pipes

Hot rolled precision steel pipes use continuous casting round tube blank or bloomed slab as raw materials, which are heated by a walking beam heating furnace, descaled by high-pressure water, and then enter the roughing mill. The roughed material is cut, tailed, and then entered the finishing mill. Computer controlled rolling is implemented. After final rolling, it is cooled by laminar flow and rolled by a coiler to become a direct coil. The head and tail of straight hair curls tend to be tongue shaped and fish tailed, with poor accuracy in thickness and width. There are often defects such as wave shaped, folded edges, and tower shaped edges. Its coil weight is relatively heavy, and the inner diameter of the steel coil is 760 mm. After finishing with head cutting, tail cutting, edge cutting, and multiple passes of straightening, leveling, and other finishing lines, the straight coil is cut or recoiled to form products such as hot rolled steel plates, flat hot rolled steel coils, and longitudinally cut strips. Hot rolled finished coils are formed by pickling to remove oxide scales and coating them with oil.

Common specifications of precision steel pipes

10# 0.07~0.13 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 20# 0.17~0.23 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 35# 0.32~0.39 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035 45# 0.42~0.50 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035 40cr 0.37~0.44 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035 0.08~1.10 25Mn 0.22~0.2 0.17~0.37 0.70~1.00 ≤0.035 ≤0.035 ≤0.25 37Mn5 0.30~0.39 0.15~0.30 1.20~1.50 ≤0.015 ≤0.020